Thinking of possible engines I could put in my RX8 if (when) the rotary dies as I am not paying £3500 for a rebuild on an untuable NA engine, think I'd rather go with a 4 pot turbo so sr20 seems to probably be the logical choice, but are there others that would work well ? or be cheaper ? are there any conversions out there to mate an impreza engine with a rear drive box ? even thought about a turbo'd 1.8 mx5 engine as the engine and box can be got for peanuts but then I think getting up towards 300bhp from that lump is expensive !!! unless anyone can tell me better ? will a volvo T4 engine fit to any RWD gearbox ? any other suggestions ? this could all be a long time in the future as my engine might be absolutely fine for a long time but if I can decide on an idea I can start collecting little bits that I'll need right away.